There is a couple of places where the test suite uses the
pixman_image_fill_* functions to initialize images. These functions
can fail, and will do so if the "fast" implementation is disabled.
So to make sure the test suite passes even using
PIXMAN_DISABLE="fast", use pixman_image_composite32() with a solid
image instead of pixman_image_fill_*.
All the tests are linked to libutil, hence it makes sence to always
include utils.h and reuse what it provides (config.h inclusion, access
to private pixman APIs, ARRAY_LENGTH, ...).
Green Hills Software MULTI compiler was producing a number
of warnings due to incorrect uses of int instead of the correct
corresponding pixman_*_t type.
This extends scaling-crash-test to test some more things:
- All combinations of NEAREST/BILINEAR/CONVOLUTION filters and
NORMAL/PAD/REFLECT repeat modes.
- Tests various scale factors very close to 1/7th such that the source
area is very close to edge of the source image.
- The same things, only with scale factors very close to 1/32767th.
- Enables the commented-out tests for accessing memory outside the
source buffer.
Also there is now a border around the source buffer which has a
different color than the source buffer itself so that if we sample
outside, it will show up.
Finally, the test now allows the destination buffer to not be changed
at all. This allows pixman to simply bail out in cases where the
transformation too strange.
This test tries to exploit some corner cases and previously known
bugs in nearest neighbor scaling fast path code, attempting to
crash pixman or cause some other nasty effect.
